C# |类型。GetEnumNames()方法
原文:https://www . geesforgeks . org/c-sharp-type-getenumnames-method/
类型。GetEnumNames()方法用于返回当前枚举类型成员的名称。
语法:
public virtual string[] GetEnumNames ();
返回:这个方法返回一个包含枚举成员名称的数组。 异常:如果当前类型不是枚举，这个方法会给出 ArgumentException 。
以下程序说明了上述方法的使用:
例 1:
C
// C# program to demonstrate the
// Type.GetEnumNames(Object) Method
using System;
using System.Globalization;
using System.Reflection;
class GFG {
// Defining enum ABC
enum ABC { A,
B,
C,
D,
E,
F }
// Main Method
public static void Main()
{
// try-catch block to
// handle exceptions
try {
// Creating and initializing object
// of ABC with instance of enum ABC
ABC a = ABC.A;
// Declaring and initializing
// object of Type
Type type = a.GetType();
// Getting Array of constants
// By using GetEnumNames() method
string[] obj = type.GetEnumNames();
// Display Array obj
Console.WriteLine("The constants are as follow :-");
for (int i = 0; i < obj.Length; i++)
Console.Write("{0} ", obj[i]);
}
// catch ArgumentException here
catch (ArgumentException e)
{
Console.Write("The current type is not an enumeration.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
Output:
The constants are as follow :-
A B C D E F
示例 2: 适用于参数异常
C
// C# program to demonstrate the
// Type.GetEnumNames(Object) Method
using System;
using System.Globalization;
using System.Reflection;
class GFG {
// Defining enum ABC
enum ABC { A,
B,
C,
D,
E,
F }
// Main Method
public static void Main()
{
// Creating try-catch block
// to handle exceptions
try {
// Declaring and initializing
// object of Type
Type type = typeof(int);
// Getting Array of constants
// By using GetEnumNames() method
string[] obj = type.GetEnumNames();
// Display Array obj
Console.WriteLine("The constants are as follow :-");
for (int i = 0; i < obj.Length; i++)
Console.Write("{0} ", obj[i]);
}
// catch ArgumentException here
catch (ArgumentException e)
{
Console.WriteLine("The current type is not an enumeration.");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
Output:
The current type is not an enumeration.
Exception Thrown: System.ArgumentException
参考:
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